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Ex. 1
Fig. 1
Fig. 1
𝜎 𝑝𝑒𝑟 ∗ 𝑆
Fig. 2
Fig. 2
Ex. 2
Fig. 3
Fig. 3
𝜎𝑐
𝜎𝑡
= 𝜎 𝑝𝑒𝑟
= 𝜎 𝑝𝑒𝑟
Ex. 3
Fig. 4
Fig. 4
𝜎
𝜎
𝜎
𝜎
𝜎
Ex. 4
Fig. 5
Fig. 5
𝜎
𝜎
𝜎
𝜎
𝜎
𝜎

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